국가예방접종전산등록체계 개발을 위한 민간의료 기관 하부구조 및 환경 조사연구

이무식,김은영,이건세,이석구,홍지영,김건엽,김대경,신의철,이연경,기몽서,나백주,김영택 한국모자보건학회 2003 한국모자보건학회지 Vol.7 No.2

저장 온도 및 상대습도가 비타민 정제 중 지용성 비타민 함량의 변화에 미치는 영향

김동섭,이재황,김세곤,이동언,박석준,이진희,이강표,최성원,백무열 경희대학교식량자원개발연구소 2007 硏究論文集 Vol.26 No.1

용접 잔류응력장에서의 피로균열성장거동에 관한 연구

이재철,주석재,김진무 울산대학교 1994 공학연구논문집 Vol.25 No.2

본 논문에서는 알루미늄 합금 5052-H38 판재를 비구속 가스 텅스텐 아크 맞대기 용접을 한 후 압축잔류응력장으로부터 균열이 성장할 때 피로균열성장 거동에 대해 조사하였다. 압축잔류응력 영역에서 피로균열성장이 지연되었고, 이것에 대한 영향을 중첩의 원리로 잔류응력확대계수에 의하여 고찰하였다. In this paper, fatigue crack growth behaviors of unrestrained welded aluminum alloy 5052-H38 plates were investigated when cracks were propagated in the compressive residual stress field. In the regions of compressive residual stress was retarded fatigue crack growth rate, whose effect was analyzed in terms of residual stress intensity factor with superposition concepts.

油壓曲管路에서 非定常流의 壓力降下에 관한 硏究

李茂錫,朴吉文,曺秉崎 조선대학교 생산기술연구소 1984 生産技術硏究 Vol.6 No.2

The pressure props of coiled tubes were studied experimentally with hydraulic oil Gulf Harmony 32 for unsteady flows. In addition, friction factors are investigated as function of Curvature ratio(a/R), Reynolds number (Re), Dean number(De), and frequency parameter(α). The three coils were used with curvature ratio (a/R) of O.1, O.04, and O.02, and the total length of coiled tube is 11.3m, respectively. The experimental results are obtained as follows; 1). Pressure drops of straight tubes agree with Hagen-Poiseuille fomula. 2). Ratio of friction factors (fc/fs) is more than 1, and increases with Reynolds number. 3). Friction factor increases as curvature ratio (a/R) and number of coil are higher. 4). The ratio of friction factor (fc/fs) is higher when frequency parameter is of about 2∼3.

원관군 배열형상에 따른 유동 및 열전달 특성에 관한 수치 해석

이진호,정석재,김무현 연세대학교 대학원 1986 延世論叢 Vol.22 No.1

일부 고등학생에서 성(性)적 활동의 위험요인 분석

이무식,김은영,천병철,이석구,전경희,최은주 한국모자보건학회 2000 한국모자보건학회지 Vol.4 No.2

압축형 앵커 내부 그라우트의 지반에 의한 포아송 효과

이창무,홍석우 동의대학교 산업기술개발연구소 2000 産業技術硏究誌 Vol.14 No.-

앵커는 그 형식에 따라 힘을 받는 기구가 달라진다. 본 연구에서는 인장형과 압축형으로 분류되는 마찰형 앵커의 저항특성 및 기구를 분석하였고, 또한 압축형 앵커의 내하체 압축시험결과를 이용하여 압축형 앵커 내부 그라우트의 포아송 효과를 분석하여 계산식을 제안하였다. 압축형 앵커의 특성을 요약하면 다음과 같다. (1) 압축형 앵커가 인장형 앵커보다 인발시 진행성의 영향이 적은 것으로 밝혀졌다. (2) 압축형 앵커는 인발시 그라우트의 포아송 효과로 인해 주면마찰저항이 증가한다. The resistance mechanism of anchor changes according to the types of anchor. Friction anchor is classified into tension and compression types. In this study, the characteristics and mechanism of pullout are analysed, through compression test results of anchor body grout. The characteristics of compression anchor are summarized mainly as follows : (1) The effect of progressive failure of compression anchor body are much smaller than those of tension anchor during pullout of anchor ; (2) The skin friction resistance is increased by poisson effect of grout (anchor body) during pullout of compression anchor.

전남지역 학교급식의 위생관리 실태

고무석,정난희,이전옥 한국가정과학회 2004 한국가정과학회지 Vol.7 No.1

This study analyzed the effects of nutrition technicians' hygiene education on cooking workers' performance of hygiene management in order to ensure the security of school meals. The situation of cooking workers' disposition in subject schools was elementary school(51.1%) and middle school(48.9%) and the type of meals was rural area type(54.2%), urban type(36.5%), and island and isolated area type(9.3%). The methods of meals management were single cooking(88.2%) and joint cooking and management(11.8%). The type of distributing meals was distributing in a dining room(93.5%), in a classroom(3.7%), and in both dining room and classroom(2.8%). Nutrition technicians' employment form included regular(53.5%) and daily(88.2%). Their education was junior college graduate(50.2%), university graduate(44.8%), and graduate school students(5.0%). Cooking workers' employment form included daily(88.2%) and regular(11.1%), suggesting that most were regular. Most cooking workers(77.4%) had at least high school certificate. Regarding the situation of cooking workers' disposition in subject schools, the number of student per one cooking worker was found as 91-120(37.2%), 61-90(22.6%), 60 and under(21.1%), 121-150(16.7%), and 151 and over(2.5%). Cooking workers' level of performance of hygiene management was post-working stage(66.37/75 marks), pre-working stage(64.22/75 marks), and working stage(20.34/25 marks). The counting of meals articles in a pre-working stage(20.34/25 marks), temperature and required time in a working stage(18.78/25 marks), and machinery equipment and hygiene in a pre-working stage(21.40/25 marks) showed lowest of performance, which suggest poor service of hygiene. Cooking workers' performance of hygiene management by working stage showed the significant difference with school class(p<.001), type of schools with meals(p<.05), state of cooking workers' employment(p<.001), and cooking worker's disposition(p<.05). A working stage showed the significant difference with type of schools with meals(p<.05). A post-working stage showed the significant difference according to type of schools with meals(p<.05), and the methods of meals management(p<.05), and cooking workers' disposition(p<.05). In the execution of hygiene education, individual hygiene was highest(94.8%), followed by the management of machinery equipment and tools(89.7%), food poisoning and microorganism(94.7%), and the method of food treatment(76.4%). A yearly plan of hygiene education included established(83.9%) and not established(16.1%). Regular education included not executed(25.1%), 2~3 times a month(16.1%), and more than 4 a month(4.0%) and occasional education was not executed(57.0%), 1-3 times a month(26.3%), and more than 4 a month(15.7%). In the methods for hygiene education, oral education(95.7%) was used most, followed by demonstration(10.5%), poster/photo(10.5%), video/slide(3.7%), and computer(3.7%). Frequency of improvement and complement of hygiene education included once a month(56.3%), once a year(20.7%), by quarter(11.5%), and every six months(11.5%). Newspaper was used most in materials of hygiene education, followed by internet, TV, nutrition technician's reeducation, information exchange between members, educational office's training, and reference book, and educational office's material, and symposium. Cooking workers' assessment of the effect of hygiene education was conducted through observation(56.8%), check table(15.2%), question(14.0%), and examination(14.0%). The reason of cooking workers' low level of performance included habitual custom(53.9%), lack of understanding(20.4%), overwork(14.6%), and lack of knowledge(11.1%) and the reason of difficulty in hygiene education included lack of time(55.3%), lack of understanding(27.6%), lack of knowledge and information(8.7%), and lack of budget(48.0%).

Air-Pulsing에 의한 SS여과와 인제거 특성에 관한 연구

김무식,김학석,이두희 대구보건대학 2005 대구보건대학 論文集 Vol.25 No.-

This study was performed to evaluate the ability of air-lifting and air-pulsing system which was applied a wastewater treatment facilities to retrofit the system. The factors of operating the system are hydraulic retention time, MLSS concentration and direct rejection time respectively. The experiments and results are as follows ; 1) It was the rejection time which enhanced the phosphorus removal efficiency in this system to reduce the secondary P-release to deteriorate the treated water. It was shown that the T-P removal was over 90% in HRT of 8 hours but the variation of air-lifting time from 30 minutes to 60 minutes were not fluctuated the removal efficiency of T-P. It means that the efficiency is no subject to air-lifting time. 2) The direct rejection process using the air-pulsing system was effective to protect the fouling in membrane and the concentration of effluent SS was stabilized during the operating period.

平齒車의 이뿌리에 發生하는 應力에 關한 硏究

김진무,이경식,주석재 울산대학교 1983 연구논문집 Vol.14 No.2

물림율이 2以上일 때 平齒車의 한 개의 齒가 물리기 始作하여 끝날 때까지 分擔하는 荷重과 이뿌리에 發生하는 應力을 光彈性實驗으로 測定하였다. 그리고 이 結果를 使用하여 決定한 齒의 크기는 一般的인 設計値보다 約 25%정도 작게 할 수 있었다. The partial load acting on a tooth and the stress at the tooth root of a spur gear, were measured using the photoelastic apparatus when the contact ratio is greater than 2. The result shows that the gear would be designed about 25% smaller than conventionally used one when the contact ratio is grater than 2.